如何在Scala中公开Kafka的Java方法(带有分区的CommitSync)? [英] How to expose Java method for Kafka (commitSync with partitions) in Scala?

问题描述

我正在尝试通过Scala公开Java方法(有关原始Java方法的更多详细信息-它来自

I am trying to expose Java method via Scala (more details on original java method - it is coming from Kafka)

这是原始的Java方法:

This is original Java method:

public void commitSync(Map<TopicPartition,OffsetAndMetadata> offsets)

如何在Scala中公开参数并将其传递给方法?我有类似的东西:

How to expose and pass parameters to a method in Scala? I have something like:

def commitSync() = {
     consumer.commitSync(...)
}

谢谢.

推荐答案

您的Scala代码段看起来是正确的，这就是我填写其余代码的方式:

Your Scala snippet looks correct, this is how I'd fill up the rest of it:

import org.apache.kafka.clients.consumer.{KafkaConsumer, OffsetAndMetadata}
import org.apache.kafka.common.TopicPartition

import collection.mutable.Map
import collection.JavaConverters._

//initialise your consumer the way you want
val consumer = createKafkaConsumer(config, subscriptions)

//you could accept a scala.collection.mutable.Map here
def commitSync(offsets: Map[TopicPartition, OffsetAndMetadata]) = {
    //and then convert it to a java.util.Map
    consumer.commitSync(offsets.asJava)
}

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